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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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187 UNREACHABLE(); | 187 UNREACHABLE(); |
188 return isolate->heap()->undefined_value(); // Make compiler happy. | 188 return isolate->heap()->undefined_value(); // Make compiler happy. |
189 } | 189 } |
190 | 190 |
191 | 191 |
192 BUILTIN(EmptyFunction) { | 192 BUILTIN(EmptyFunction) { |
193 return isolate->heap()->undefined_value(); | 193 return isolate->heap()->undefined_value(); |
194 } | 194 } |
195 | 195 |
196 | 196 |
197 static MaybeObject* ArrayConstructorStubFailureCommon( | |
198 Isolate* isolate, | |
199 Handle<JSFunction> constructor, | |
200 Handle<Object> type_info, | |
201 Arguments* caller_args) { | |
202 bool holey = false; | |
203 bool can_use_type_feedback = true; | |
204 if (caller_args->length() == 1) { | |
205 Object* argument_one = (*caller_args)[0]; | |
206 if (argument_one->IsSmi()) { | |
207 int value = Smi::cast(argument_one)->value(); | |
208 if (value < 0 || value >= JSObject::kInitialMaxFastElementArray) { | |
209 // the array is a dictionary in this case. | |
210 can_use_type_feedback = false; | |
211 } else if (value != 0) { | |
212 holey = true; | |
213 } | |
214 } else { | |
215 // Non-smi length argument produces a dictionary | |
216 can_use_type_feedback = false; | |
217 } | |
218 } | |
219 | |
220 JSArray* array; | |
221 MaybeObject* maybe_array; | |
222 if (!type_info.is_null() && | |
223 *type_info != isolate->heap()->undefined_value() && | |
224 JSGlobalPropertyCell::cast(*type_info)->value()->IsSmi() && | |
225 can_use_type_feedback) { | |
226 JSGlobalPropertyCell* cell = JSGlobalPropertyCell::cast(*type_info); | |
227 Smi* smi = Smi::cast(cell->value()); | |
228 ElementsKind to_kind = static_cast<ElementsKind>(smi->value()); | |
229 if (holey && !IsFastHoleyElementsKind(to_kind)) { | |
230 to_kind = GetHoleyElementsKind(to_kind); | |
231 // Update the allocation site info to reflect the advice alteration. | |
232 cell->set_value(Smi::FromInt(to_kind)); | |
233 } | |
234 | |
235 maybe_array = isolate->heap()->AllocateJSObjectWithAllocationSite( | |
236 *constructor, type_info); | |
237 if (!maybe_array->To(&array)) return maybe_array; | |
238 } else { | |
239 maybe_array = isolate->heap()->AllocateJSObject(*constructor); | |
240 if (!maybe_array->To(&array)) return maybe_array; | |
241 // We might need to transition to holey | |
242 ElementsKind kind = constructor->initial_map()->elements_kind(); | |
243 if (holey && !IsFastHoleyElementsKind(kind)) { | |
244 kind = GetHoleyElementsKind(kind); | |
245 maybe_array = array->TransitionElementsKind(kind); | |
246 if (maybe_array->IsFailure()) return maybe_array; | |
247 } | |
248 } | |
249 | |
250 maybe_array = isolate->heap()->AllocateJSArrayStorage(array, 0, 0, | |
251 DONT_INITIALIZE_ARRAY_ELEMENTS); | |
252 if (maybe_array->IsFailure()) return maybe_array; | |
253 maybe_array = ArrayConstructInitializeElements(array, caller_args); | |
254 if (maybe_array->IsFailure()) return maybe_array; | |
255 return array; | |
256 } | |
257 | |
258 | |
259 RUNTIME_FUNCTION(MaybeObject*, ArrayConstructor_StubFailure) { | |
260 // If we get 2 arguments then they are the stub parameters (constructor, type | |
261 // info). If we get 3, then the first one is a pointer to the arguments | |
262 // passed by the caller. | |
263 Arguments empty_args(0, NULL); | |
264 bool no_caller_args = args.length() == 2; | |
265 ASSERT(no_caller_args || args.length() == 3); | |
266 int parameters_start = no_caller_args ? 0 : 1; | |
267 Arguments* caller_args = no_caller_args | |
268 ? &empty_args | |
269 : reinterpret_cast<Arguments*>(args[0]); | |
270 Handle<JSFunction> constructor = args.at<JSFunction>(parameters_start); | |
271 Handle<Object> type_info = args.at<Object>(parameters_start + 1); | |
272 | |
273 return ArrayConstructorStubFailureCommon(isolate, | |
274 constructor, | |
275 type_info, | |
276 caller_args); | |
277 } | |
278 | |
279 | |
280 RUNTIME_FUNCTION(MaybeObject*, InternalArrayConstructor_StubFailure) { | |
281 Arguments empty_args(0, NULL); | |
282 bool no_caller_args = args.length() == 1; | |
283 ASSERT(no_caller_args || args.length() == 2); | |
284 int parameters_start = no_caller_args ? 0 : 1; | |
285 Arguments* caller_args = no_caller_args | |
286 ? &empty_args | |
287 : reinterpret_cast<Arguments*>(args[0]); | |
288 Handle<JSFunction> constructor = args.at<JSFunction>(parameters_start); | |
289 | |
290 return ArrayConstructorStubFailureCommon(isolate, | |
291 constructor, | |
292 Handle<Object>::null(), | |
293 caller_args); | |
294 } | |
295 | |
296 | |
297 static MaybeObject* ArrayCodeGenericCommon(Arguments* args, | 197 static MaybeObject* ArrayCodeGenericCommon(Arguments* args, |
298 Isolate* isolate, | 198 Isolate* isolate, |
299 JSFunction* constructor) { | 199 JSFunction* constructor) { |
300 ASSERT(args->length() >= 1); | 200 ASSERT(args->length() >= 1); |
301 Heap* heap = isolate->heap(); | 201 Heap* heap = isolate->heap(); |
302 isolate->counters()->array_function_runtime()->Increment(); | 202 isolate->counters()->array_function_runtime()->Increment(); |
303 | 203 |
304 JSArray* array; | 204 JSArray* array; |
305 if (CalledAsConstructor(isolate)) { | 205 if (CalledAsConstructor(isolate)) { |
306 array = JSArray::cast((*args)[0]); | 206 array = JSArray::cast((*args)[0]); |
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1930 return Handle<Code>(code_address); \ | 1830 return Handle<Code>(code_address); \ |
1931 } | 1831 } |
1932 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) | 1832 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C) |
1933 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) | 1833 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A) |
1934 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) | 1834 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A) |
1935 #undef DEFINE_BUILTIN_ACCESSOR_C | 1835 #undef DEFINE_BUILTIN_ACCESSOR_C |
1936 #undef DEFINE_BUILTIN_ACCESSOR_A | 1836 #undef DEFINE_BUILTIN_ACCESSOR_A |
1937 | 1837 |
1938 | 1838 |
1939 } } // namespace v8::internal | 1839 } } // namespace v8::internal |
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